Metric, Apothecary, and Household Systems of Measurement
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Measurements in Med Orders | Med orders are written in metric terms. Solid and liquid measures in the metric system and their equivalents.
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| Liquid doses, medicine cups, and syringes | When ur preparing liquid doses, a knowledge of apothecary and household equivalents will help u pour exact amounts. Medicine cups are marked in metric, apothecary, & household measures; syringes are marked in metric & apothecary lines.
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| Measures of Weight | These are the solid measures in the metric system
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| Measures of Weight & their Abbreviations | and their abbreviations:Gram: g or gmMilligram: mgMicrogram: mcg (µg, which uses the Greek letter mu [µ], is no longer accepted by The Joint Commission for its approved abbreviation list)Kilogram: kg
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| Weight Equivalents | 1 g = 1000 mg1 mg = 1000 mcgAs you can see, the gram is the largest of these.To equal the weight of a single gram, you need 1000 mg.To equal the weight of a single milligram, you need 1000 mcg. g > mg > mcg
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| Meaning of this symbol: " > " | The symbol >, which means “greater than”
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| Meaning of this symbol: " < " | The symbol <, which means “less than”
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| Converting Solid Equivalents | If the available supply is not in the same weight measure as the medication order, you will have to calculate how much of a drug to give.
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| RULE CHANGING GRAMS TO MILLIGRAMS | To multiply by 1000, move the decimal point three places to the right.
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| RULE CHANGING MILLIGRAMS TO GRAMS | To divide by 1000, move the decimal point three places to the left.
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| RULE CHANGING MILLIGRAMS TO MICROGRAMS | The second major weight equivalent in the metric system is 1 mg = 1000 mcg.To multiply by 1000, move the decimal point three places to the right.
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| Purpose of orders being written in MICROGRAMS | Some medications are so powerful that smaller microgram doses are sufficient to produce a therapeutic effect. Rather than using milligrams written as decimals, it's easier to write orders in micrograms as whole numbers.
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| RULE CHANGING MICROGRAMS TO MILLIGRAMS | To divide by 1000, move the decimal point three places to the left.
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Created by:
nicole4rc